package com.sky.service.impl;/*
 * ClassName: DishServiceImpl
 * Package : com.sky.service.impl
 * Description:
 * @Author zKer
 * @Create 2024/4/13 21:07
 */

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetMealDishMapper setMealDishMapper;

    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        //向菜品表插入1条数据
        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //向口味表插入n条数据
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    @Transactional
    public void delete(List<Long> ids) {
        //遍历ids
        for (int i = 0; i < ids.size(); i++) {
            Dish dish = dishMapper.selectById(ids.get(i));
            //判断是否在售
            if (dish.getStatus() == 1) {
                //若在售则抛出异常
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        List<Long> setMealIds = setMealDishMapper.getSetMealIdsByDishIds(ids);
        //判断是否关联套餐
        if (setMealIds != null && setMealIds.size() > 0) {
            //若存在则抛出异常
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //遍历删除菜品
//        for (int i = 0; i < ids.size(); i++) {
//            dishMapper.deleteById(ids.get(i));
//            dishFlavorMapper.deleteById(ids.get(i));
//        }
        //根据id批量删除菜品
        dishMapper.deleteByIds(ids);

        //根据id批量删除菜品口味
        dishFlavorMapper.deleteByIds(ids);
    }

    @Override
    public DishVO getByIdWithFlavor(Long dishId) {
        //根据id查询菜品数据
        Dish dish = dishMapper.selectById(dishId);
        //根据菜品id查询菜品口味数据
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(dishId);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(flavors);
        return dishVO;
    }

    @Override
    public Result updateWithFlavor(DishDTO dishDTO) {
        //修改菜品
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        //获得菜品口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        //删除原来口味
        dishFlavorMapper.deleteById(dishDTO.getId());
        //添加新的口味
        if (flavors != null && flavors.size() > 0) {
            //向口味表插入n条数据
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
        //提交
        return Result.success();
    }

    @Override
    public List<Dish> getListByid(Long id) {
        Dish dish = Dish.builder()
                .categoryId(id)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> list = dishMapper.list(dish);
        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : list){
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d, dishVO);
            //根据菜品id查询菜品口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());
            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }
        return dishVOList;
    }

    @Override
    public void startOrStop(Integer status, Long id) {

        dishMapper.startOrStop(status, id);
    }
}
